Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
collin.edu
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-18 05:59:43 UTC · ↺ Refresh
MX Hostnames
- collin-edu.mail.protection.outlook.com
MX Priorities
- collin-edu.mail.protection.outlook.com: 0
A / AAAA Records
- 34.236.193.193 ↩ ec2-34-236-193-193.compute-1.amazonaws.com
- 3.209.26.193 ↩ ec2-3-209-26-193.compute-1.amazonaws.com
- 52.73.2.219
Mail Server IPs
- 52.101.11.15 ↩ mail-sa9pr02cu00207.inbound.protection.outlook.com
- 52.101.42.18 ↩ mail-co1pr03cu00302.inbound.protection.outlook.com
- 52.101.194.0 ↩ mail-ch5pr02cu00200.inbound.protection.outlook.com
- 52.101.42.14 ↩ mail-mw2pr04cu00106.inbound.protection.outlook.com
- 2a01:111:f403:c92c::2 ↩ mail-dm2pr04cu00102.inbound.protection.outlook.com
- 2a01:111:f403:c946::4 ↩ mail-ch0pr04cu00504.inbound.protection.outlook.com
- 2a01:111:f403:f802::2 ↩ mail-sj2pr05cu00202.inbound.protection.outlook.com
- 2a01:111:f403:c91d::a ↩ mail-co1pr21cu00202.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1.collin.edu postmaster.collin.edu 2026031106 1200 600 1209600 7200
Primary NS (mname)
ns1.collin.edu
Admin Email (rname)
postmaster@collin.edu
Serial
2026031106
Refresh
1200s
Retry
600s
Expire
1209600s
Minimum TTL
7200s
Nameservers (NS)
ns1.collin.edu
ns2.collin.edu
ns5.dnsmadeeasy.com
ns6.dnsmadeeasy.com
ns7.dnsmadeeasy.com
SPF Record
✓ Strict (-all)
v=spf1 a:mail.collin.edu IP4:192.231.40.54 include:spf.protection.outlook.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
9 records- adobe-idp-site-verification=e98e906a-212a-4b2c-9e19-1ad3783e678d
- cisco-ci-domain-verification=1e33ccc0dc4444028e63c77a47dc1a54dbe0e2c53debf611d600988fdbff51af
- atlassian-domain-verification=qRs6BNTmPVBU1kwinzc1ZdgpftumudvmiE4u/B9sewP65ILYhqGKQ3FLBEMxRwO8
- atlassian-domain-verification=8zsc6XhzpKpEyOZP1HwzbmUVzygaoJlHpoZbQMePEpktqoJ7awuUt8sMizxOtnry
- SPFv=spf1 a:mail.collin.edu IP4:192.231.40.54 include:spf.protection.outlook.com -all
- google-site-verification=CPN4GEDwH8SVy1sPB-41wvV1ugBdxDt9WTpBwvHWGy8
- MS=ms49678140
- teamviewer-sso-verification=418280ca511c42248f7272790567986c
- openai-domain-verification=dv-bgeBzSrhLfRn6Po7uKhmCcNx
Full email verification for collin.edu
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